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It is suggested how an ordinary differential Bourdon gauge can easily be transformed into an absolute manometer.
The construction and operation of a new calorimeter are described. The advantages of this calorimeter are its versatility, simplicity, and ease of operation. This calorimeter can be designed and constructed in less than one day and it allows for the measurement of heat capacities while either...
The design, construction, and operational characteristics of a continuous 3 He– 4 He dilution refrigerator specifically built for use in muon spin relaxation ( μSR) measurements at LAMPF are described in this paper. The refrigerator is unique in that it makes an angle of 30° with respect to...
The design of an easily constructed particle injection system for use with laboratory burners is presented. The particles are entrained in the flow using directed gas jets which are positioned in a standard glass flask. The characteristics of the system are evaluated using coal flyash particles...
A procedure of diode laser bandwidth control is investigated where bandwidth is primarily determined by adjusting the laser temperature and where compensating injection current changes are used to retune the laser to an atomic or molecular absorption resonance. A theoretical model shows that...
An A/D converter has been interfaced to an Epson HX‐20 computer to log geophysical data.
A precision analog temperature programmer is presented for use with the Teflon cell technique which is extensively used in high‐pressure studies. The stability of temperature control is within ±0.1°C of the setpoint value. Linear temperature versus time ramps selectable from 1°C/min to...
An electron impact ion source using a solid charge was interfaced with A/D and D/A units which are connected to a microprocessor control unit. A PID (proportional, integral, and derivative) control algorithm was implemented to control the ion source. The power fed to the ion source filament and...
An apparatus for using low‐energy ion scattering to study surface crystallography is described. The ion source can produce highly collimated beams of either noble gas or alkali metal ions with energies up to 30 keV. A versatile manipulator has been built that enables the entire UHV chamber to...
The double exposure laser speckle photography technique has been used to measure the radial velocity profile in a simple gas jet. In order to achieve operation in the speckle regime, the flow was seeded with a high density (1.35×10 7 cm − 3 ) of 0.6‐μm‐diam aerosol droplets. At low...
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